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dsTest, Developing Solutions, Sd Interface, TDF Testing, PCRF Testing, Big Data, DPI Testing

dsTest supports the Sd Diameter interface on both the (client) Policy Charging and Rules Function (PCRF) and the (server) Traffic Detection Function (TDF) in 3GPP LTE networks. Test the provisioning and reporting of Application Detection and Control (ADC) rules on your TDF with our PCRF Emulator. Test the capacity and performance of your PCRF with TDF simulation. The Sd reference point is stateful. Use the PCRF Emulator and the Sd Interface application in tandem to test Diameter Routing Agents (DRA),  Proxies, Relay Agents, and Redirect Agents.

You may have legacy Deep Packet Inspection (DPI) applications that have been providing policy enforcement information to your PCRF. Verify that these applications still perform correctly with your latest PCC implementations. Test new DPI applications against your PCRF and TDF implementations. This testing also supports the primary use of Big Data — to identify new patterns and allow them to provide new business opportunities, revenues, and efficiencies  to network operators.

dsTest allows you to leverage your existing tools and test environments, supplementing your testing without major investment in new testing resources.  For more information, see our Use Case on Testing DPI within an Existing PDN test environment.


The Sd Interface application provides for:

  • Provisioning of Application Detection and Control (ADC) rules from the PCRF for the purpose of traffic detection and enforcement at the TDF;
  • Usage monitoring control of TDF sessions and of detected applications;
  • Reporting the start/stop of a detected application’s traffic.

The Sd application implements the following procedures for the PCRF:

  • Installation of ADC rules on the TDF;
  • Removal of ADC rules on the TDF;
  • Provisioning of ADC event triggers on the TDF.

The Sd application implements the following procedures for the TDF:

  • Transfer of service data flow descriptions for detected applications from the TDF to the PCRF;
  • Transfer of application instance identifier from the TDF to the PCRF.

A complete set of events that can be generated with the Sd interface application can be found here.

As with all dsTest products, the node configurations and test scenarios are easily defined and configured with XML files that are validated against a published XML Schema to avoid invalid definitions. With our dsClient GUI, you can create, run, and archive tests, capture, graph and archive operational measurements, capture real-time data flows, and manage your dsTest servers and testing scenarios with a standalone application that runs on your PC.

TDF Testing (Client Sd Simulation)dsTest, Developing Solutions, Sd Testing, TDF Testing, PCRF Testing, Big Data, DPI, Deep Packet Inspection

Our PCRF Simulator executes procedures based on configurable subscriber profiles and service profiles, responding to requests and reports from TDFs and eliminating the need to dedicate a production server to lab activities.

Read more about testing Policy Management.

PCRF Testing (Server Sd Emulation)

dsTest, Developing Solutions, Sd Interface, PCRF Testing, TDF Testing, Deep Packet Inspection, Big DataThe Sd Interface application can be used to simulate a TDF’s functionality to test new traffic detection rules on your PCRF before they are deployed in a network. The Sd Interface application allows users to validate PCRF performance and capacity in a realistic network environment, replicating the deployment configuration.

Multiple TDF emulators can be instantiated on a single server, each with scalable subscriber loads and transaction rates. In this mode, up to 1000 independent nodes may be simultaneously simulated.

Advanced Testing Features

SmartEvents — Alter application behavior or coordinate multiple interface applications with SmartEvents. Our programmable, subscriber-level state machine gives you the ability to define handlers for specified application events that can then cause an event in another application to be executed. You can also configure handlers to modify subscriber information during run-time, introduce timers, or randomize subscriber behavior based on configurable probabilities to name a few of the many options in one of dsTest’s most powerful features.

SmartMessageElement — Insert, delete, or replace elements in Diameter, RADIUS, MAP, LDAP, GTP, REST, or SOAP messages with our SmartMessageElement solution. Define proprietary signaling or corrupt elements to facilitate negative testing. You can specify when your elements are used with SmartEvents.

Traffic Profile — Draw the shape of your test actions across time with Traffic Profile. You can define the rate for any action as a static rate or reference a Traffic Profile configuration, which also means that multiple Traffic Profiles can be running currently. Use Traffic Profile in conjunction with the randomizing features in SmartEvents to design a test that more truly simulates real-world network activity.

Diameter Dictionary — Define a set of message templates against which all messages will be validated with our Diameter Dictionary. Whether you’re load testing or testing functionality all messages are validated.

Operational Measurements

dsTest provides rich sets of measurements for the Sd interface:

  • Transaction and transport layer attempts, successes, and failures
  • Transaction duration, transactions-per-second, and round-trip delay
  • Message and byte counters
  • Errors encountered and error indications received in messages

See our Online Help for Sd measurements, Diameter measurements, and socket measurements.

You can read more about the reporting features offered with dsTest and dsClient here.

Supporting StandardsPCRF Emulation, TDF Simulation